Blue smoke – oil from crank case vent – Page 3

This topic contains 91 replies, has 0 voices, and was last updated by drew 15 years, 5 months ago.

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September 29, 2009 at 1:06 am #154415

Eric Smith
Member

Moto wrote:

Quote:

White is definitely water. I left my black used engine out over the weekend from louee and when I got back on SUnday I realised I had left it out, it was as white as a snowy Christmas

Who the hell sees snow at Christmas time in Australia???

But white does mean water, not fuel.

September 29, 2009 at 1:21 am #154418

Eric Smith
Member

Sorry Mr Admin sir. The question was posted by Austblue whether the white residue was from water or fuel. Moto and I answered that it is from water, as did TB I believe!

Surely that is helpful? :dry:

Sorry, will keep on topic in future. :blush:

September 29, 2009 at 2:15 am #154423

Trent
Member

Thanks guys I was still interested it it was in fact possibly fuel. I’ll be strict about placing a rag under the airbox wash cover in future.

Can anyone confirm how you test you’re getting spark at the lead? I think I’ve asked before but is it just a case of sticking a screw driver in against the point and holding the steel shaft and feel for a jolt?

September 29, 2009 at 2:27 am #154426

Paul
Member

Austblue wrote:

Quote:

Can anyone confirm how you test you’re getting spark at the lead? I think I’ve asked before but is it just a case of sticking a screw driver in against the point and holding the steel shaft and feel for a jolt?

No mate dont do that, put a good spark plug in the lead and hold it against the engine/earth.
You should hear a good crack and see the white spark. A weak blue spark indicates a problem.

September 29, 2009 at 2:28 am #154425

Dean
Member

Austblue wrote:

Quote:

Thanks guys I was still interested it it was in fact possibly fuel. I’ll be strict about placing a rag under the airbox wash cover in future.

Can anyone confirm how you test you’re getting spark at the lead? I think I’ve asked before but is it just a case of sticking a screw driver in against the point and holding the steel shaft and feel for a jolt?

Yes Trent this is how all the Pro’s do it,some even use their tongue for a better feel of the voltage,let us know how you go.

Ollie

September 29, 2009 at 2:36 am #154427

Trent
Member

Haha cheeky bugger! Thanks again. I might duck down to broadmeadow and pick up some more plugs too since I’ve fouled the spare slightly. Once they’re fouled are they cactus or just clean it in petrol?

September 29, 2009 at 2:40 am #154428

Dean
Member

Wire brush, bit of emery paper on the electrode usually does the trick

Ollie

September 29, 2009 at 8:00 am #154429

Trent
Member

Kicked over fine this arvo and I got temp in it and gave it a rev and no sign of oil out the vent hose and definitely no blue smoke. I might take it for a ride later in the week but I think its good to go for the weekend!

Thanks again for the help guys its much appreciated.

September 29, 2009 at 8:06 am #154441

Paul
Member

Just clean up the plugs with a wire brush, but a new one every 6 months or so is a good idea.

September 30, 2009 at 3:26 am #154442

Anonymous

Glad to hear she’s ready and ripping mate

October 1, 2009 at 8:06 am #154571

Trent
Member

Houston we have a problem! I went down the garage to get the bike prepped for saturday and it started first press crisp as. Ran for about a minute then didn’t want to idle and stalled. Started again then stalled. I took a look at the sight glass and the oil looks bad I’ve just pulled the valve cover off and noticed a smidgen of white oil. Clicked it into 1st and tried to turn the back wheel to put it at TDC and I can’t move it

I’m going to drop the oil and take a better look at it but from my little mechanical knowledge I’m thinking water in the oil is gasket failure at best. I’ll pull the head off and look for any damage and then with any luck a new piston/ring head and base gasket will fix it so I can still ride on saturday. Hopefully blackwoods have a torque wrench on the shelf I suppose I’ll need one now.

I don’t mean to sound like a quitter but this will do me for this bike. PM me your 2stroke prices moto I’m switching teams

October 1, 2009 at 8:18 am #154789

Greg
Member

Pull the spark plug out and see if you can turn it over AB?

If the problem is coolant in the barrel on top of the piston, when you turn it over the coolant should cush out the plug hole and the engine should turn over

TB

October 1, 2009 at 8:34 am #154795

Trent
Member

I tried that and nothing came out I can try it again now – is it safe to use the electric start do you think?

Are there any other possible causes for water in the oil?

October 1, 2009 at 8:40 am #154796

Trent
Member

Pulled the plug again and hit the starter with it in gear and its turning ok and no bad noises.

Why would water in the oil stop it from running though?

October 1, 2009 at 8:44 am #154797

Greg
Member

If the coolant gets on top of the piston, when the piston comes up the coolant cant compress like air does thus causing an hydraulic lock

Its incredibly hard to diagnose something via the Internet but lets try

How much white sludge is in the tappet cover?

Is it using coolant, have you had to top it up?

Is the coolant low?

On a seperate note is there any oil in the air filter housing again?

TB
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